
package com.yunqiao.common.utils;

import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import io.swagger.annotations.ApiModel;
import io.swagger.annotations.ApiModelProperty;
import lombok.Data;

import java.io.Serializable;
import java.util.List;

/**
 * 分页工具类
 *
 * @author Crocutax
 * @email wangxw725@163.com
 * @date 2019年3月2日 下午15:23:05
 */
@Data
@ApiModel(value = "分页对象")
public class PageUtils<T> implements Serializable {

    private static final long serialVersionUID = 1L;
    //总记录数
    @ApiModelProperty(value = "总记录数")
    private long totalCount;
    //每页记录数
    @ApiModelProperty(value = "每页记录数")
    private long pageSize;
    //总页数
    @ApiModelProperty(value = "总页数")
    private long totalPage;
    //当前页数
    @ApiModelProperty(value = "当前页数")
    private long currPage;
    //列表数据
    @ApiModelProperty(value = "列表数据")
    private List<T> list;

    /**
     * 分页
     * @param list        列表数据
     * @param totalCount  总记录数
     * @param pageSize    每页记录数
     * @param currPage    当前页数
     */
    public PageUtils(List<T> list, int totalCount, int pageSize, int currPage) {
        this.list = list;
        this.totalCount = totalCount;
        this.pageSize = pageSize;
        this.currPage = currPage;
        this.totalPage = (int)Math.ceil((double)totalCount/pageSize);
    }

    /**
     * 分页
     */
    public PageUtils(IPage<T> page) {
        this.list = page.getRecords();
        this.totalCount = (int)page.getTotal();
        this.pageSize = page.getSize();
        this.currPage = page.getCurrent();
        this.totalPage = (int)page.getPages();
    }
}
